CVE-2026-53818 json
OpenClaw < 2026.4.24 - Owner-Only Tool Policy Bypass via MCP Loopback
published 5mo ago modified 4mo ago also EUVD-2026-36324 , GHSA-rj6p-xmxr-qj4h
- cvss
- 6.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 0%
- public exploits
- 0
- none known
Summary
OpenClaw before 2026.4.24 contains an authorization bypass vulnerability in the MCP loopback feature that allows non-owner callers to skip owner-only tool policies and before-tool-call hooks. Attackers can invoke owner-only behavior through the affected loopback path to execute restricted tools when the feature is enabled and reachable.
Patch / fix
- npm openclaw 2026.4.24
- OpenClaw OpenClaw 2026.4.24
Is CVE-2026-53818 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.10% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N |
| CNA | 3.1 | 6.6 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L |
| GitHub | 3.1 | 6.6 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | openclaw | <2026.4.24 |
2026.4.24 |
Affected products
- OpenClaw OpenClaw
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/openclaw/openclaw/security/advisories/GHSA-rj6p-xmxr-qj4h
vendor-advisory, web, mitigation, advisory
-
vulncheck.com
/advisories/openclaw-owner-only-tool-policy-bypass-via-mcp-loopback
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-53818
advisory
-
github.com
/openclaw/openclaw
package
Sources
- CVE List CVE-2026-53818
- GitHub Advisory GHSA-rj6p-xmxr-qj4h
- NVD CVE-2026-53818
- Maintainer advisory GHSA-rj6p-xmxr-qj4h
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of openclaw/openclaw published their own advisory on GitHub. Reviewed sources take precedence over it.